#include <math.h>
#include <errno.h>
#include <stdbool.h>

#define P0 -0.713793159E+1
#define P1 -0.190333999E+0
#define Q0 -0.428277109E+2
#define Q1  0.100000000E+1

#define P(z) (P1*z+P0)
#define Q(z) (Q1*z+Q0)

#define K1 0.69316101074218750000E+0 /* ln(v)   */
#define K2 0.24999308500451499336E+0 /* v**(-2) */
#define K3 0.13830277879601902638E-4 /* v/2-1   */

//WMAX is defined as ln(HUGE_VALF)-ln(v)+0.69
#define WMAX 44.93535952E+0
//WBAR 0.35*(b+1)
#define WBAR 1.05
#define YBAR 9.0 /*Works for me*/

float sincoshf( float x, bool iscosh ) {
  float y, w, z;
  bool sign;
  if( x < 0.0 ) {
    y = -x;
    sign = 1;
  } else {
    y = x;
    sign = 0;
  }
  if( ( y > 1.0 ) || iscosh ) {
    if( y > YBAR ) {
      w = y - K1;
      if( w > WMAX ) {
        errno = ERANGE;
        z = HUGE_VALF;
      } else {
        z = expf( w );
        z += K3 * z;
      }
    } else {
      z = expf( y );
      w = 1.0 / z;
      if( !iscosh ) {
        w = -w;
      }
      z = ( z + w ) * 0.5;
    }
    if( sign ) {
      z = -z;
    }
  } else {
    if( y < EPS )
    { z = x; }
    else {
      z = x * x;
      z = x + x * z * P( z ) / Q( z );
    }
  }
  return z;
}
